>From my Radio Shack education back in the early 1970's..........NE-2 bulbs required 220K when running off 120VAC line and used 1/25 watt. NE-2H (high-brightness) used a 22K resistor and used 1/4 watt. --------------------------------------------------------------------------------------------- Sad fact.....I did not get into nixie tubes when they were cheaply and readily available at Radio Shack because I refused to believe a TTL device (74141) could tolerate the high-voltage used with nixies. Even the datasheet said the max voltage was 60V and I neglected the voltage-drop across the tube. That ignorance kept me away from nixies for roughly 35 years until I built my first clock from junkbox parts in 2011. Nope, I didn't use a 74141 in that clock and never will use them.... On Sunday, January 24, 2021 at 10:05:21 AM UTC-8 Dekatron42 wrote:
> There are many types/models of NE-2 neons, look at the table at the end of > the book "Using and Understanding Small Neon Lamps" by William G Miller, > might be in the files section on teh forum or can be downloaded from the > internet, the list contains recommended resistor values for 115 VAC - the > resistance value varies from 30k to 250k for the various models of NE-2. > > /Martin > > On Sunday, 24 January 2021 at 17:07:42 UTC+1 philthepill wrote: > >> Yohan sorry for misspelling your name. >> >> Pharma Phil >> >> ---------- Original Message ---------- >> From: Yohan Park <w...@kitsunegari.net> >> Date: January 23, 2021 at 7:10 PM >> >> Phil, sorry I'm getting back at this but I think you're seriously >> overdriving these NE-2 bulbs. >> Even the high brightness versions need a 33K resistor. >> Regular NE-2 bulbs (which you most likely use as well) require around >> 150K >> I'm running standard brightness bulbs in my wall switches on 230V and I'm >> using 330K >> Always go as high as you can with resistor value. >> I've been running standard bulbs on 220K and they became luke warm to >> touch. This reduces the lifetime of the bulb and can cause blackening of >> the glass. >> >> On Saturday, January 16, 2021 at 1:52:34 AM UTC+1 philthepill wrote: >> >> I make my own lighted switches... >> >> I connect NE-2 lamps with a 20 K-ohm resistor at both ends of about 8 >> inches wire, drill a small hole in the switch face plate and push the end >> of the lamp thru just a little and hot melt glue it in place. If the face >> plate is white, you can just glue the lamp to the backside of the faceplate >> and it will shine thru. I wire the other ends of the resistors to the hot >> and neutral terminals that go to the light. When the light is off, the neon >> lamp lights, and when the light is on, the neon is off. You can find all >> the light switches in my house at night just by looking for the neon glow. >> They have never needed replacing. If you want to be super safe, you can use >> 4 x K-ohm resistors, two just next to the neon body and the other two at >> the other end of the wires. I use heat shrink over the resistor connections >> in both cases. Very cheap and effective but not UL or CSA approved. >> >> Pharma Phil >> >> ---------- Original Message ---------- >> From: Nick Andrews < nickja...@gmail.com> >> Date: January 15, 2021 at 12:20 PM >> >> Sweet! I've been thinking of looking for a lighted switch in the 'on' >> position for the attic lights we installed to maybe remind us to turn them >> off. Been up there a bit lately, running cable. More cameras, power, commo. >> New NVR has 10 cameras, I think have added about a dozen new duplex >> outlets, and so far 17 runs of cat5 through the house. More to come. >> >> Yes, some thermostats had mercury bulbs in them, the bigger ones having >> bigger bulbs. I grab those wherever I can find them, getting scarce now. >> There were also contactors with a fairly significant amount in them, but >> tricky to open for recovery. OLD ignitrons I think had a large amount in >> them. Sure mercury can be toxic, but it kills me to see the ridiculously >> idiotic overreactions to things like broken fluorescent bulbs in schools or >> places. I know a guy who built a box device to try recovering the mercury >> from old bulbs. It wasn't worth the hassle. A 4' flo bulb has what, about >> 1/20 of a drop of mercury in it? I've broken hundreds of them, and 8' ones >> too in my time. In high school we used them for lightsabers at the >> university dump. >> >> I use mercury in my carburetor sync gauge for my bike. I know they make >> some now with a little tungsten rod in them which are safer, and maybe I'll >> buy one some day. But for now, I'll hoard my little stash... >> >> On Fri, Jan 15, 2021 at 9:15 AM martin martin < mcve...@gmail.com> >> wrote: >> >> Greetings all, >> >> These are no longer available in the US as of 40+ years ago. I found one >> in a box and had to put it back in to service! >> They were sold as "silent switches". Small tube of mercury to make the >> contact and the toggle switch has a large NE-2 for a nice looking night >> light. >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neonixie-l+...@googlegroups.com. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/eab74d90-5a82-4b95-ac32-7d461e176485n%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/eab74d90-5a82-4b95-ac32-7d461e176485n%40googlegroups.com?utm_medium=email&utm_source=footer>. >> >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neonixie-l+...@googlegroups.com. >> >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/CAJD4P-jHyrUMFQ3a1Mga9EcnLVJJmGZR8TATu0hqacdxBy7vfA%40mail.gmail.com >> >> <https://groups.google.com/d/msgid/neonixie-l/CAJD4P-jHyrUMFQ3a1Mga9EcnLVJJmGZR8TATu0hqacdxBy7vfA%40mail.gmail.com?utm_medium=email&utm_source=footer>. >> >> >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neonixie-l+...@googlegroups.com. >> >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/4afbdd00-4926-4e50-8857-43e9f5d5c40cn%40googlegroups.com >> >> <https://groups.google.com/d/msgid/neonixie-l/4afbdd00-4926-4e50-8857-43e9f5d5c40cn%40googlegroups.com?utm_medium=email&utm_source=footer>. >> >> >> >> >> >> > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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